summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/drivers/kim1.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mess/drivers/kim1.c')
-rw-r--r--src/mess/drivers/kim1.c359
1 files changed, 0 insertions, 359 deletions
diff --git a/src/mess/drivers/kim1.c b/src/mess/drivers/kim1.c
deleted file mode 100644
index 71a98a96cdf..00000000000
--- a/src/mess/drivers/kim1.c
+++ /dev/null
@@ -1,359 +0,0 @@
-// license:GPL-2.0+
-// copyright-holders:Juergen Buchmueller
-/******************************************************************************
- KIM-1
-
- system driver
-
- Juergen Buchmueller, Oct 1999
-
- KIM-1 memory map
-
- range short description
- 0000-03FF RAM
- 1400-16FF ???
- 1700-173F 6530-003 see 6530
- 1740-177F 6530-002 see 6530
- 1780-17BF RAM internal 6530-003
- 17C0-17FF RAM internal 6530-002
- 1800-1BFF ROM internal 6530-003
- 1C00-1FFF ROM internal 6530-002
-
- 6530
- offset R/W short purpose
- 0 X DRA Data register A
- 1 X DDRA Data direction register A
- 2 X DRB Data register B
- 3 X DDRB Data direction register B
- 4 W CNT1T Count down from value, divide by 1, disable IRQ
- 5 W CNT8T Count down from value, divide by 8, disable IRQ
- 6 W CNT64T Count down from value, divide by 64, disable IRQ
- R LATCH Read current counter value, disable IRQ
- 7 W CNT1KT Count down from value, divide by 1024, disable IRQ
- R STATUS Read counter statzs, bit 7 = 1 means counter overflow
- 8 X DRA Data register A
- 9 X DDRA Data direction register A
- A X DRB Data register B
- B X DDRB Data direction register B
- C W CNT1I Count down from value, divide by 1, enable IRQ
- D W CNT8I Count down from value, divide by 8, enable IRQ
- E W CNT64I Count down from value, divide by 64, enable IRQ
- R LATCH Read current counter value, enable IRQ
- F W CNT1KI Count down from value, divide by 1024, enable IRQ
- R STATUS Read counter statzs, bit 7 = 1 means counter overflow
-
- 6530-002 (U2)
- DRA bit write read
- ---------------------------------------------
- 0-6 segments A-G key columns 1-7
- 7 PTR KBD
-
- DRB bit write read
- ---------------------------------------------
- 0 PTR -/-
- 1-4 dec 1-3 key row 1-3
- 4 RW3
- 5-9 7-seg 1-6
- 6530-003 (U3)
- DRA bit write read
- ---------------------------------------------
- 0-7 bus PA0-7 bus PA0-7
-
- DRB bit write read
- ---------------------------------------------
- 0-7 bus PB0-7 bus PB0-7
-
-
-The cassette interface
-======================
-
-The KIM-1 stores data on cassette using 2 frequencies: ~3700Hz (high) and ~2400Hz
-(low). A high tone is output for 9 cycles and a low tone for 6 cycles. A logic bit
-is encoded using 3 sequences of high and low tones. It always starts with a high
-tone and ends with a low tone. The middle tone is high for a logic 0 and low for
-0 logic 1.
-
-These high and low tone signals are fed to a circuit containing a LM565 PLL and
-a 311 comparator. For a high tone a 1 is passed to DB7 of 6530-U2 for a low tone
-a 0 is passed. The KIM-1 software measures the time it takes for the signal to
-change from 1 to 0.
-
-
-
-Pasting:
- 0-F : as is
- + (inc) : ^
- AD : -
- DA : =
- GO : X
-
-(note: DA only works when addressing RAM)
-
-Test Paste:
- =11^22^33^44^55^66^77^88^99^-0000
- Now press up-arrow to confirm the data has been entered.
-
-******************************************************************************/
-
-#include "emu.h"
-#include "cpu/m6502/m6502.h"
-#include "sound/dac.h"
-#include "machine/mos6530.h"
-#include "imagedev/cassette.h"
-#include "formats/kim1_cas.h"
-#include "kim1.lh"
-
-
-class kim1_state : public driver_device
-{
-public:
- kim1_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag),
- m_maincpu(*this, "maincpu"),
- m_riot2(*this, "miot_u2"),
- m_cass(*this, "cassette"),
- m_line0(*this, "LINE0"),
- m_line1(*this, "LINE1"),
- m_line2(*this, "LINE2"),
- m_line3(*this, "LINE3") { }
-
- required_device<cpu_device> m_maincpu;
- required_device<mos6530_device> m_riot2;
- required_device<cassette_image_device> m_cass;
- DECLARE_READ8_MEMBER(kim1_u2_read_a);
- DECLARE_WRITE8_MEMBER(kim1_u2_write_a);
- DECLARE_READ8_MEMBER(kim1_u2_read_b);
- DECLARE_WRITE8_MEMBER(kim1_u2_write_b);
- UINT8 m_u2_port_b;
- UINT8 m_311_output;
- UINT32 m_cassette_high_count;
- UINT8 m_led_time[6];
- virtual void machine_start();
- virtual void machine_reset();
- DECLARE_INPUT_CHANGED_MEMBER(kim1_reset);
- TIMER_DEVICE_CALLBACK_MEMBER(kim1_cassette_input);
- TIMER_DEVICE_CALLBACK_MEMBER(kim1_update_leds);
-
-protected:
- required_ioport m_line0;
- required_ioport m_line1;
- required_ioport m_line2;
- required_ioport m_line3;
-};
-
-
-
-
-
-static ADDRESS_MAP_START(kim1_map, AS_PROGRAM, 8, kim1_state)
- AM_RANGE(0x0000, 0x03ff) AM_MIRROR(0xe000) AM_RAM
- AM_RANGE(0x1700, 0x173f) AM_MIRROR(0xe000) AM_DEVREADWRITE("miot_u3", mos6530_device, read, write )
- AM_RANGE(0x1740, 0x177f) AM_MIRROR(0xe000) AM_DEVREADWRITE("miot_u2", mos6530_device, read, write )
- AM_RANGE(0x1780, 0x17bf) AM_MIRROR(0xe000) AM_RAM
- AM_RANGE(0x17c0, 0x17ff) AM_MIRROR(0xe000) AM_RAM
- AM_RANGE(0x1800, 0x1bff) AM_MIRROR(0xe000) AM_ROM
- AM_RANGE(0x1c00, 0x1fff) AM_MIRROR(0xe000) AM_ROM
-ADDRESS_MAP_END
-
-
-INPUT_CHANGED_MEMBER(kim1_state::kim1_reset)
-{
- if (newval == 0)
- m_maincpu->reset();
-}
-
-
-static INPUT_PORTS_START( kim1 )
- PORT_START("LINE0") /* IN0 keys row 0 */
- PORT_BIT( 0x80, 0x00, IPT_UNUSED )
- PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0')
- PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1')
- PORT_BIT( 0x10, 0x10, IPT_KEYBOARD ) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2')
- PORT_BIT( 0x08, 0x08, IPT_KEYBOARD ) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3')
- PORT_BIT( 0x04, 0x04, IPT_KEYBOARD ) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4')
- PORT_BIT( 0x02, 0x02, IPT_KEYBOARD ) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5')
- PORT_BIT( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6')
-
- PORT_START("LINE1") /* IN1 keys row 1 */
- PORT_BIT( 0x80, 0x00, IPT_UNUSED )
- PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7')
- PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8')
- PORT_BIT( 0x10, 0x10, IPT_KEYBOARD ) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9')
- PORT_BIT( 0x08, 0x08, IPT_KEYBOARD ) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A')
- PORT_BIT( 0x04, 0x04, IPT_KEYBOARD ) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B')
- PORT_BIT( 0x02, 0x02, IPT_KEYBOARD ) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C')
- PORT_BIT( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D')
-
- PORT_START("LINE2") /* IN2 keys row 2 */
- PORT_BIT( 0x80, 0x00, IPT_UNUSED )
- PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E')
- PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F')
- PORT_BIT( 0x10, 0x10, IPT_KEYBOARD ) PORT_NAME("AD") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-')
- PORT_BIT( 0x08, 0x08, IPT_KEYBOARD ) PORT_NAME("DA") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=')
- PORT_BIT( 0x04, 0x04, IPT_KEYBOARD ) PORT_NAME("+") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
- PORT_BIT( 0x02, 0x02, IPT_KEYBOARD ) PORT_NAME("GO") PORT_CODE(KEYCODE_X) PORT_CHAR('X')
- PORT_BIT( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("PC") PORT_CODE(KEYCODE_F6)
-
- PORT_START("LINE3") /* IN3 STEP and RESET keys, MODE switch */
- PORT_BIT( 0x80, 0x00, IPT_UNUSED )
- PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("sw1: ST") PORT_CODE(KEYCODE_F7)
- PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("sw2: RS") PORT_CODE(KEYCODE_F3) PORT_CHANGED_MEMBER(DEVICE_SELF, kim1_state, kim1_reset, NULL)
- PORT_DIPNAME(0x10, 0x10, "sw3: SS") PORT_CODE(KEYCODE_NUMLOCK) PORT_TOGGLE
- PORT_DIPSETTING( 0x00, "single step")
- PORT_DIPSETTING( 0x10, "run")
- PORT_BIT( 0x08, 0x00, IPT_UNUSED )
- PORT_BIT( 0x04, 0x00, IPT_UNUSED )
- PORT_BIT( 0x02, 0x00, IPT_UNUSED )
- PORT_BIT( 0x01, 0x00, IPT_UNUSED )
-INPUT_PORTS_END
-
-
-READ8_MEMBER( kim1_state::kim1_u2_read_a )
-{
- UINT8 data = 0xff;
-
- switch( ( m_u2_port_b >> 1 ) & 0x0f )
- {
- case 0:
- data = m_line0->read();
- break;
- case 1:
- data = m_line1->read();
- break;
- case 2:
- data = m_line2->read();
- break;
- }
- return data;
-}
-
-
-WRITE8_MEMBER( kim1_state::kim1_u2_write_a )
-{
- UINT8 idx = ( m_u2_port_b >> 1 ) & 0x0f;
-
- if ( idx >= 4 && idx < 10 )
- {
- if ( data & 0x80 )
- {
- output_set_digit_value( idx-4, data & 0x7f );
- m_led_time[idx - 4] = 15;
- }
- }
-}
-
-READ8_MEMBER( kim1_state::kim1_u2_read_b )
-{
- if ( m_riot2->portb_out_get() & 0x20 )
- return 0xFF;
-
- return 0x7F | ( m_311_output ^ 0x80 );
-}
-
-
-WRITE8_MEMBER( kim1_state::kim1_u2_write_b )
-{
- m_u2_port_b = data;
-
- if ( data & 0x20 )
- /* cassette write/speaker update */
- m_cass->output(( data & 0x80 ) ? -1.0 : 1.0 );
-
- /* Set IRQ when bit 7 is cleared */
-}
-
-
-TIMER_DEVICE_CALLBACK_MEMBER(kim1_state::kim1_cassette_input)
-{
- double tap_val = m_cass->input();
-
- if ( tap_val <= 0 )
- {
- if ( m_cassette_high_count )
- {
- m_311_output = ( m_cassette_high_count < 8 ) ? 0x80 : 0;
- m_cassette_high_count = 0;
- }
- }
-
- if ( tap_val > 0 )
- m_cassette_high_count++;
-}
-
-
-TIMER_DEVICE_CALLBACK_MEMBER(kim1_state::kim1_update_leds)
-{
- UINT8 i;
-
- for ( i = 0; i < 6; i++ )
- {
- if ( m_led_time[i] )
- m_led_time[i]--;
- else
- output_set_digit_value( i, 0 );
- }
-}
-
-
-void kim1_state::machine_start()
-{
- save_item(NAME(m_u2_port_b));
- save_item(NAME(m_311_output));
- save_item(NAME(m_cassette_high_count));
-}
-
-
-void kim1_state::machine_reset()
-{
- UINT8 i;
-
- for ( i = 0; i < 6; i++ )
- m_led_time[i] = 0;
-
- m_311_output = 0;
- m_cassette_high_count = 0;
-}
-
-
-static MACHINE_CONFIG_START( kim1, kim1_state )
- /* basic machine hardware */
- MCFG_CPU_ADD("maincpu", M6502, 1000000) /* 1 MHz */
- MCFG_CPU_PROGRAM_MAP(kim1_map)
- MCFG_QUANTUM_TIME(attotime::from_hz(60))
-
-
- /* video */
- MCFG_DEFAULT_LAYOUT( layout_kim1 )
-
- /* sound hardware */
- MCFG_SPEAKER_STANDARD_MONO("mono")
- MCFG_SOUND_ADD("dac", DAC, 0)
- MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
-
- /* devices */
- MCFG_DEVICE_ADD("miot_u2", MOS6530, 1000000)
- MCFG_MOS6530_IN_PA_CB(READ8(kim1_state, kim1_u2_read_a))
- MCFG_MOS6530_OUT_PA_CB(WRITE8(kim1_state, kim1_u2_write_a))
- MCFG_MOS6530_IN_PB_CB(READ8(kim1_state, kim1_u2_read_b))
- MCFG_MOS6530_OUT_PB_CB(WRITE8(kim1_state, kim1_u2_write_b))
-
- MCFG_DEVICE_ADD("miot_u3", MOS6530, 1000000)
-
- MCFG_CASSETTE_ADD( "cassette" )
- MCFG_CASSETTE_FORMATS(kim1_cassette_formats)
- MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_STOPPED)
-
- MCFG_TIMER_DRIVER_ADD_PERIODIC("led_timer", kim1_state, kim1_update_leds, attotime::from_hz(60))
- MCFG_TIMER_DRIVER_ADD_PERIODIC("cassette_timer", kim1_state, kim1_cassette_input, attotime::from_hz(44100))
-MACHINE_CONFIG_END
-
-
-ROM_START(kim1)
- ROM_REGION(0x10000,"maincpu",0)
- ROM_LOAD("6530-003.bin", 0x1800, 0x0400, CRC(a2a56502) SHA1(60b6e48f35fe4899e29166641bac3e81e3b9d220))
- ROM_LOAD("6530-002.bin", 0x1c00, 0x0400, CRC(2b08e923) SHA1(054f7f6989af3a59462ffb0372b6f56f307b5362))
-ROM_END
-
-
-/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
-COMP( 1975, kim1, 0, 0, kim1, kim1, driver_device, 0, "MOS Technologies", "KIM-1" , MACHINE_SUPPORTS_SAVE)